Switch-socket.



R. B. BENJAMIN.

SWITCH SOCKET APPLICATION FILED APR. 10. 1909v 1,021 1 77. Patented Mar. 26, 1912.

2 SHEETB-8EEET 1.

77512265585: 38 fizlniors UNITED STATES PATENT OFFICE.

REUBEN BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SWITCH-SOCKET.

Specification of Letters Patent.

Patented Mar. 26, 1912.

To all whom it may concern:

Be it known that I, REUBEN B. BENJA- MIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Switch-Sockets, of, which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to improvements in switch sockets for incandescent lamps.

One of the objects of my invention is to provide a .pull switch in which the switch operating mechanism has movement in a direction crosswise of the socket and may be thus operated by a direct pull.

For the purpose of disclosing my inven tion I have illustrated one form thereof in the accompanyingdrawings, in which Figure 1 is a longitudinal sectional new of a device embodying the features of my invention, the section being taken on the line 1-1 of Figs. 2 and 3, looking in the direction of the arrows; Fig. 2 shows in elevation the rear portion of the device, with the cap orcover removed; Fig. 3 is an elevational view of theinsulating base and the switch ineclia'nisni carried thereby, the front side of the base bein seen, or that side to which the lamp-holder is secured, the switch belng 1n the off position; Fig. 4 is a view similar to Fig. 3, but shows the parts to which the chain is attached drawn forward and the switch thrown to the on position, certain parts being broken away to expose to view parts which are concealed in Fig. 3; Fig. 5 is a sectional view of the base and switch mechanism, taken on the line 5-5 of Figs. 2 and 3, looking in th direction of the arrows; Fig. 6 is a broken sectional view of the base,showing a fra ment of the thread ed lamp-receiving shell and the contacts of the switch mechanism, the section being taken on the-linefi of Fig. 2, looking in the direction of the arrows; Fig. 7 is an elevational end view of the device looking into the socket; Fig. 8 shows in perspective the parts of the switch mechanism arranged one above the other in such relation to one another as to be readily assembled Fig. 9 is a partial sectional view of the base, the section being taken on the line 9 of Fig. 3, looking in the direction indicated by the arrow; Fig. 10 is an elevational view of a detail showing the switch blade and other parts, associated therewith; and Fig. 11 is an elevational view of parts of the switch mechanism in the off position.

In the construction of the device as illustrated I provide a substantially disk-shaped insulating base having one of its sides chambered out to provide space for the mechanism of the switch device. A threaded lamp-receiving shell is secured to the front face of the base over-the switch mechanism by bolts 17 and 18, which pass through inwardly extending oppositely disposed cars 16' and extend through openings 19 and 20 into suitable nuts 1.7 and 18 on the rear'of the base.

The center contact member of the socket consists of a current-carrying plate or strip 21, which extends along the side of the base from front to rear and is bent inward at each end toward the axis of the base. The rear end of the plate is provided with a binding screw 22, which is held on the plate by a nut 22. The forward end 23 of the strip 21 extends inward toward the center of the threaded shell, in position to be engaged by the center terminal of the lamp. An in- -sulating plate 24 is located between the resilient end 23 of the strip 21 and the inturned cars 16, to prevent the center contact 23 from being bent backward into engagement with the live parts of the switch mechanism when a lamp is screwed into the socket. As a further security against short circuiting,- a mica washer 24 is placed behind the plate 24. This washer has a slot formed therein for the passage of the strip 21 therethrough. A Z-shapcd plate 25 has oneof its ends clamped between the threaded shell 16 and the base 15, as shown in Fig. 6. and forms one of the stationary contacts of the switch. The second stationary con tact comprises a plate 9.6, of substantially the same form as the plate 25, secured in the bottom of the switch chamber by means of a screw 27 adapted to extend through the base and into a binding plate 28 on the rear face of the base. The line wire is connected to the second plate by a binding screw 29 located thereon.

It will be seen that with one of the leads attached to binding screw 22 and the other ind] electrically connected by the movable memher of the switch. The mechanism hereinafter described for operating the movable member of the switch is so constructed that the part which is manually moved travels I one direction or the other as desired.

In the bottom of the switch'chamber is formed a depression to receive an'enlarged end 30 of a pivot pin or post 31, about which the oscillating switch blade carrying member and member for moving same, turn. The pivot pin is secured in place by a screw 30 which passes through the base. 32 of the enlarged end 30 is of smaller diameter to receive a coiled spring 33 having its ends 34 and 35 arranged to extend away from the post and to embrace a downturned finger 36 carried by an oscillating plate 37L A washer 38 is on the post and, seated upon the part 32, holds the spring 33 in position. The plate 37 has extending radially thercfrom an insulating bar or blade 39 adapted to carry at its outer end the bridging contact 40. Pivoted on the post 31 is another plate 42, having a downwardly extending finger 43 adapted to lie outside the finger 36 of the plate 37. The ends34 and 35 of the spring 33 grasp between them both the fingers 36 and 43, and. when the plate 42 is moved in either direction about its axis the spring tends to cause the plate 37, with the switch blade carried thereby, to move in the same direction as the plate 42. A slide-plate 44 is arranged to reciprocate endwise above the plate 42, thepost 41 projecting through a slot 44* extending longitudinally of the slide-plate. This plate carries on its under side a tongue 45 pivoted to one end 46 of the plate 44 and so arranged as to be permitted to move a short distance on either side of a straight line taken through its pivot and the post- 31. Means are provided, as hereinafter described, for normally restoring said tongue to a position wherein the point of the tongue lies in the straight line. The end 47 of the slide opposite the end to which thetongue 45 is pivoted, is bent downwardly and provided with a notch 48 adapted to receive the end of a chain 49 or the like, by the use of which the slide-plate 44 may be moved 1 forward. To return the plate 44 to normal position when the chain is re A portion leased, there is provided a spring 50 which is coiled around one end of a hollow rivet 51 extending through a suitable aperture in the base. One end of said spring is seated in a notch 52 in the base and the opposite endhooks behind a lug 53 on the plate 44.

A stationary guide plate 54 extends across the chamber in the base and has an opening 55 through which projects the upper end of the post 31. This plate has a pair of downwardly extending ears 56 with which corresponding ears 57 carried by the tongue 45 45 will enter one or the other of a pair ofnotches 57 a and 58 formed in the edge of the oscillating plate 42, the particular notch which the tongue will enter depending upon whether the plate 42 occupies its right hand or left hand position. The plate 44 is provided-with a portion 59 which extends upward into a notch 60 in the guide plate 54, to guide the slide-plate 44. in its movement. The plate 54 is also provided with an elongated slot 61 through which projects a lug 53 on the slide-plate, to further guide the slide-plate in its movement back and forth. When the slide-plate 44 is drawn forward by the hand of the operator, the point of the tongue 45 enters one of the notches 57 or 58. Further movement of the slide-plate causes the oscillating plate 42- to turn onthe post and place the spring 33 under tension. This is due to the fact that the plate 37 is at first prevented from moving with the plate 42, by the engagement of a tongue 62 carried thereby with a finger 63 carried by the slide-plate 44. \Vhen, however, the

slide-plate has moved far enough to cause the finger 63 to pass off the end of the tongue (32, the plate 37 is released and is thrown quickly by the spring 33 to such a position that the fingers 36 and 43 of the plates 37 and 42 overlie each other. hen the slide plate is permitted to be moved back to normal position by the spring 50, the pivoted tongue 45 is straightened with respect to the slide-plate by the engagement of the ears 57 thereof with the ears56 of the guideplate 54. Upon the next forward movement of theslidc plate the pivoted tongue will enter the other notch of the plate 42 be- 1 cause this plate is" in its other position, and the operation described above will be repeated except that the plates 37 and 42 will be shifted in the direction opposite to that in which they were shifted by the last operation. When the parts are in the position shown in Fig.4, the movable contact 40 enters the space-between the plates 25 and 26 and bridges the gap between these plates,

't-ubular shell64 and conceals the rear face of the base and the binding screws carried thereby; The rear face of the base is formed with channels 66 and 67 which extend from the binding screws to a notch 68 in the edge of the base and accommodate the lead wires.

The casing 64 has an embossment 69 on one side of the portion of larger diameter, and secured in this embossment is a neck 69" which is internally threaded to receive the threaded end of a pipe or the like. In wiring the device the conductors will be brought in through the neck 69 into the notch 68 in the base and will be laid in the grooves or channjsls 66 and 67 and extend to the binding giscrews 22 and 29. The tubular portion'b4 of the casing is lined with a suitable insulating sleeve 70 and the cap is provided with a lining disk 71, the edge of which engages the rearward edge of the lining sleeve 70. The sleeve 70 projects for a short distance beyond the open end of the shell 64, as usual.

While I haveshown and described one form of my invention, it will be understood that my invention" is capable of incorporation in other forms within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. The combination with an insulating base, of .a stem secured thereto, a. switch blade rockably mounted on said stem, a. tumbler rockably mounted on said stem, means for normally holding said switch Copies of this patent may be obtained for five cents each, by addressing the Commissioner Washington, D. C.

in for receiving the upward projection of said slide and guiding the same, and a return spring engaging said projection.

2. The combination with an insulating base, of a stem secured thereto, a switch blade rockably mounted on said stem, :1 tumbler rockably mounted on said stem. resilient means for normally holding said switch blade and said tumbler together, a longitudinally movable slide having a member adapted to engage said switch blade but to become disengaged therefrom when said slide is moved, an operating tongue carried by said guide and adapted to engage and move said tumbler when said slide is moved, a return spring for said slide, and a guide for said slide, said guide having projections adapted to be engaged by said tongue when said slide is returned by said spring.

3. The combination with stationary contacts, of a contact arm pivoted to oscillate, an oscillating arm having a V shaped projection, a spring, for connecting said arms, a reciprocating member, a pivoted projection on said member adapted to engage alternately on each side of said V shaped projeetion, stationary stops against which said pivoted projection engages when retracted, to more the same to normal position, and means for holding said contact arm until the spring has been placed under sufficient tension to operate the same.

In witness whereof, I have hereunto sub.- scribed my name in the presence of two witnesses.

REUBEN B. BENJAMIN.

Witnesses:

C. L. Horxms, IV. PERRY I'IAIIN.

of Patents, 

